Hello Stephen,

according to Nintex support site Nintex Workflow 2013 provision of an Exchange account should work with the current action:

Nintex Workflow Compatibility with Exchange 2016 - Nintex Knowledge Base 

Do you face any error message when trying to use the current action? It should be able to work even if you use Exchange 2013 setup in the action.

Best regards

Enrico

Thanks Enrico, I am actually wanting to use the Provision User in Exchange workflow task which uses theNintex Workflow Exchange Connector Service. As per the link you provided they only support Exchange 2007, 2010 & 2013 now.

I see. You could try to provision the mailbox by using the Exchange PowerShell console (Create user mailboxes in Exchange 2016) from within your workflow by using one of the available PowerShell activities, e. g. this one:

Would that be an option?

Best regards

Enrico